State update time is not unpredictable

Property assignment is done immediately, hence predictable. There should be an unpredictable delay.

### Note
Example needs to be adjusted to account for this unpredictability. Calling `this.forceUpdate()` will have unpredictable effects now.

Start by locating the property-assignment state update and the example mentioned in the issue. Determine how delayed, unpredictable updates should behave and adjust the example, including its use of `this.forceUpdate()`; done means the update timing is no longer immediate and the example reflects the new behavior.

Written by the indexing model from the issue text.